Don't hard-code dir in docker script.
Updates to Dockerfile.
Give article scraper it's own run method.
Remove duplicate transaction wrapping for article scrapers.
Add 'journals' parameter to ncbi article scraper.

Also remove ArticleList which is keeping elements in memory.
Add example of using journals parameter.
Sorting out conflicts between my version and Ana's update
Updating the pubmed.py version with and other fixes from Ana's branch
Added new example in pubspeed directory under update